Biochar prepared from agricultural biomass has received considerable attention because of the huge availability of ago-waste at zero cost, flexibility, high efficiency, renewability, faster contaminant removal rate, ability to treat concentrated effluent and reduction of sludge production after the treatment. This book on biochar is a comprehensive account of preparation of biochar from agricultural waste. It provides a roadmap in development of future strategy for pollution abatement and sustainable waste management. This book contains up-to-date information on biochar and its role in environment protection. The book covers useful information and applications of biochar to research scholars, academicians, agronomists, scientists and environmentalist working in the field of environment protection, bioremediation, waste management and climate change mitigation.